旋转导向钻井的导向动力系统研究

RESEARCH ON THE POWER SYSTEM USED FOR ROTARY NAVIGATION DRILLING DEVICE

旋转导向钻井技术彻底扭转了传统滑动钻井的各种弊端:井眼螺旋、扩径、岩屑堆积、轴向冲击等,同时也将减少卡钻和钻井液漏失等严重事故的发生,提高钻井效率和进尺率,从而提高钻井的经济效益。旋转导向钻井工具的导向力来源目前来说有两种方式:一为利用钻柱内外的压差直接作为导向动力;二为利用钻井液的流动推动涡轮发电,再利用电能产生导向动力,但归根到底,还是利用钻井液的能量。旋转导向钻井技术是目前最先进的钻井技术。其内部的导向动力系统是实现智能钻井的关键所在。将无位置无刷直流电动机应用到井下工具中,到目前为止,在国内还没有相关的报道。文章利用电机和泵构建了旋转导向钻井的导向动力系统,并进行了相关测试,得出了相应的技术指标。

The rotary steering drilling technology is the most ad-vanced drilling technology. The inner steering power system of rotary steering drilling equipment is the key of achieving intelligent drilling. By far,applying BLDCM to downhole instrument has not been seen in the domestic reports. The steering power system with motor and pump was set up which was used for rotary steering drilling instru-ment ,and the some corresponding technological index were obtained by the related tests.